Complexes of M(II)Sulphates with 4-Cyanobenzaldehyde and 4-Ethylbenzaldehyde-Cyclopropanecarboxylicacid Hydrazones

Abstract

Ten complexes of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) sulphates with 4-cynobenzaldehydecyclopropanecarboxylicacidhydrazone (CBHN) and 4-ethylbenzaldehydecyclopropanecarboxylicacidhydrazones (EBHN)  have been synthesized and characterized. The complexes have high melting points and in soluble in common solvents. Their low molar conductivity values are an indication of their non electrolytic nature in DMSO. The IR studies, shows the coordination of the ligands to the metals via the carbonyl oxygen, and the azomethine nitrogen, while the solphates is coordinated to the metals. The electronic spectral studies in DMSO suggest the octahedral symmetry for the complexes with exception of Ni(II) complexes which are square plannar. The antimicrobial activity of some of the complexes, are high against E-coli and streptococcus.

Keywords: Hdrazides, Hydrzones, Octahedral and Square-planer symmetry